To minimize the increase of current consumption, to reduce a transient responding time, to accelerate modulation and to obtain output light of small pulse waveform distortion even in the LED of a large internal capacity. 大きな内部容量のLEDでも、消費電流増大を最小限に抑え、過渡応答時間を短く、高速に変調でき、パルス波形歪みの小さい出力光を得る。 - 特許庁